CN218594171U - Simple battery pack control circuit - Google Patents

Abstract

The utility model discloses a simple battery pack control circuit, which comprises a high-voltage loop and an internal control unit BMS, wherein the internal control unit BMS is connected with a battery monomer and is also connected with high-voltage components, and the high-voltage components comprise a discharge interface, a charge interface, a main relay, a heating relay, a pre-charge relay, a fuse and an MSD; the internal control unit BMS is connected with control circuit's high-voltage components and parts, the battery package is equipped with safety arrangement, safety arrangement includes main fuse and heating fuse, the control circuit of battery package still is equipped with pre-charge relay, main positive relay and heating relay, the battery package is established ties through main relay and discharge positive pole, switching circuit control the break-make of battery package charge-discharge through simplifying loaded down with trivial details circuit, less high-voltage line reduces high-voltage components and parts, has reached reduce cost, the effect of reduction fault rate.

Description

Simple battery pack control circuit

Technical Field

The utility model relates to a battery control technology field, more specifically the utility model relates to a simple battery package control circuit that says so.

Background

The electric automobile needs to guarantee the endurance of the automobile and the use space of the automobile, so that the space for arranging the battery pack is limited, and various manufacturers continuously improve the energy density and the volume energy density of the battery pack and provide more schemes for solving the space problem.

Because the battery cell (module), the structural support piece, the thermal management system and the electrical system (the high-voltage circuit, the control circuit and the electrical element) are arranged in the limited space of the battery pack, the assembly space is limited, the normal safe use function is ensured, the reasonable internal arrangement is ensured, the structure is complex, and the problems of high failure rate of used circuits and elements are also solved.

Therefore, how to ensure that the battery pack can be matched with the whole vehicle for use and the circuit can be simple, the safe use is ensured, and the cost can be reduced is a simple battery pack control circuit, which is a problem that technical personnel in the field need to solve urgently.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a circuit is succinct, guarantees safe handling, can also reduce cost's battery package control circuit.

In order to achieve the purpose, the utility model provides a simple battery pack control circuit, including high-voltage loop and internal control unit BMS, internal control unit BMS is connected with the battery monomer, still is connected with high-voltage components and parts, high-voltage components and parts include discharge interface, charge interface, main relay, heating relay, pre-charge relay, fuse and MSD; the internal control unit BMS is connected with control circuit's high-pressure components and parts, the battery package is equipped with safety arrangement, safety arrangement includes main fuse and heating fuse, the control circuit of battery package still is equipped with pre-charge relay, main positive relay and heating relay, the battery package is established ties through main relay and discharge positive pole, switching circuit control the break-make of battery package charge-discharge, the inside heating circuit that is equipped with of battery package, heating circuit includes heating film, heating relay and heating fuse, the heating film is established ties to the positive pole that charges through heating relay and heating fuse, battery package main loop establishes ties with the shunt, charge-discharge state with the state recognition of internal control unit BMS is connected, and to the internal control unit BMS carries charge-discharge control signal.

Preferably, in the above simple battery pack control circuit, the battery pack is connected to the internal control unit BMS and the low voltage control harness, and is charged and discharged under the control of the internal control unit BMS, and the charge and discharge control system is connected to the battery pack internal control unit BMS through the low voltage control harness.

Preferably, in the above simple battery pack control circuit, the battery pack is provided with a communication interface, the communication interface comprises an air conditioner enabling interface, a collision signal interface, an intranet CAN-H interface, an intranet CAN-L interface, a whole vehicle CAN-H interface and a whole vehicle CAN-L interface, and the internal control unit BMS is in communication and control connection with the whole vehicle through the communication interface.

According to the technical scheme, compare with prior art, the utility model discloses a simple battery package control circuit can use a simple circuit can guarantee that the whole car of battery pack assembly is normal, safe use, through simplifying loaded down with trivial details circuit, reduces the use of high-pressure components and parts, reaches reduce cost, reduces the effect of fault rate.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the protection scope of the present invention based on the embodiments of the present invention.

Please refer to fig. 1, which is a simple battery pack control circuit disclosed in the present invention.

The utility model discloses, including high-voltage circuit and internal control unit BMS, internal control unit BMS is connected with battery monomer and high-voltage components and parts, high-voltage components and parts are equipped with discharge interface, charge interface, main relay, heating relay, pre-charge relay, fuse, MSD; the internal control unit BMS is supplied power by the lead-acid battery of the whole vehicle low-voltage system through a low-voltage connector interface and is connected with the high-voltage control component of the control loop, and the high-voltage control loop is controlled through collection, detection, control, calculation and communication, the battery pack is provided with a safety protection device which comprises a main fuse and a heating fuse, the control loop of the battery pack is also provided with a pre-charging relay, a main positive relay and a heating relay, the battery pack is connected in series with a discharging positive pole through the main relay and the switching circuit is used for controlling the on-off of the charging and discharging of the battery pack, the heating film is connected in series with the charging positive pole through the heating relay and the heating fuse, the shunt is connected in series with the main loop of the battery pack, the BMS acquires shunt information and calculates the discharging current and the battery pack capacity, the charging and discharging state is connected with the state identification of the internal control unit BMS, and the internal control unit BMS carries the charging and discharging control signal.

In order to further optimize the technical scheme, the battery pack body is connected to the battery pack internal control unit BMS and the low-voltage control wire harness, and is charged and discharged under the control of the battery pack internal control unit BMS; and the charge and discharge control system is connected with the BMS through a low-voltage wire harness.

In order to further optimize the technical scheme, the battery pack is provided with a communication interface, the communication interface comprises an air conditioner enabling interface, a collision signal interface, an intranet CAN-H interface, an intranet CAN-L interface, a whole vehicle CAN-H interface and a whole vehicle CAN-L interface, and the internal control unit BMS is in communication and control connection with a whole vehicle through the communication interface.

The utility model discloses mainly including charging, discharging and heating, BMS control main relay actuation in the charging process, the main loop switches on, the battery package is charged to the charger output current, the shunt detects the main loop current, BMS sends the demand current value to the charger through detecting the main loop current size in real time, such batteries package is full of electricity, BMS sends the demand current zero ampere, the relay cuts off the main loop simultaneously, the end of charging; in the discharging process, the BMS controls the attraction of a pre-charging relay, a pre-charging loop is conducted, the external high-voltage circuit capacitor is pre-charged, when the external voltage reaches a certain value, a main positive relay attraction main loop is conducted, the BMS detects that the main loop relay attraction is conducted, the pre-charging relay is disconnected, the pre-charging loop is disconnected, the electrification is completed at the moment, the normal output voltage of a battery pack, the BMS monitors the main loop current in real time, the communication with a battery pack external power utilization unit is achieved, the size of the output current is controlled, the main loop fuse carries out fast-fusing protection on overcurrent and short circuit, the risks caused by the short circuit and the overcurrent are guaranteed, in the heating process, the BMS detects the low-temperature state of the battery pack, the heating relay attraction is controlled, the heating loop is conducted, the heating system heats the battery pack, when the BMS detects that the temperature reaches a preset value, the BMS controls the relay disconnection, the heating loop is disconnected, and the BMS controls the attraction and the disconnection of the relay according to the temperature value detected by the temperature sensor. The circuit design ensures that each circuit has fuses (a main circuit fuse and a heating circuit fuse) for protecting safety, and short circuit and overcurrent risks are prevented; the control switches on and off relays (a main loop relay, a heating relay and a pre-charging relay), the heating relay controls a temperature heating system of the battery pack, the main loop relay controls charging and discharging of the battery pack, and the pre-charging relay controls on and off of the pre-charging loop; the main loop is connected with a shunt in series, and the shunt detects the current of the main loop; the heating membrane system is switched on by the actuation of the heater, and the heating membrane is electrified to work to generate heat to heat the battery; the system comprises an internal control unit BMS and a low-voltage control wire harness, wherein the BMS is used for collecting, detecting, controlling, calculating and communicating a battery pack and is an integral control unit of a battery pack system; the external interface is provided with a discharge interface, a charge interface and a communication interface, the charge interface and the discharge interface have a high-voltage interlocking function, the connection safety is ensured, the MSD is added in the middle of the main loop battery pack, and the high-voltage system can be cut off when the battery system is maintained, so that the voltage of the battery pack is kept at a safe voltage; the battery pack connector has a high-voltage interlocking function and is used for detecting looseness of a high-voltage loop (high-voltage power failure can be caused, the whole vehicle loses power and riding safety is influenced) and providing alarm information for a whole vehicle control system before high-voltage power failure, the time for taking countermeasures by the whole vehicle system is reserved, the battery pack connector plays a role before the vehicle is powered on and driven, when the circuit is detected to be incomplete, the system cannot be powered on, accidents caused by virtual connection and other problems are avoided, and safety accidents caused by manual misoperation are prevented. In the working process of a high-voltage system, if no high-voltage interlocking design exists, the high-voltage connecting point is manually disconnected, the voltage of the whole loop is applied to two ends of the breakpoint in the disconnection moment, the voltage breaks through air to cause arc discharge between two devices, the possibility of causing damage to people and equipment around the breakpoint is reduced, the high voltage cannot be applied to the high-voltage connector under the condition that the connector is not connected or the connection state is not good, and the use safety and the connector connection are guaranteed.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed in the embodiment corresponds to the method disclosed in the embodiment, so that the description is simple, and the relevant points can be referred to the description of the method part.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (3)

1. A simple battery pack control circuit is characterized by comprising a high-voltage loop and an internal control unit BMS, wherein the internal control unit BMS is connected with a battery monomer and is also connected with a high-voltage component, and the high-voltage component comprises a discharge interface, a charge interface, a main relay, a heating relay, a pre-charge relay, a fuse and an MSD; the internal control unit BMS is connected with control circuit's high-pressure components and parts, the battery package is equipped with safety arrangement, safety arrangement includes main fuse and heating fuse, the control circuit of battery package still is equipped with pre-charge relay, main positive relay and heating relay, the battery package is established ties through main relay and discharge positive pole, switching circuit control the break-make of battery package charge-discharge, the inside heating circuit that is equipped with of battery package, heating circuit includes heating film, heating relay and heating fuse, the heating film is established ties to the positive pole that charges through heating relay and heating fuse, battery package main loop establishes ties with the shunt, charge-discharge state with the state recognition of internal control unit BMS is connected, and to the internal control unit BMS carries charge-discharge control signal.

2. The simple battery pack control circuit according to claim 1, wherein the battery pack is connected to the internal control unit BMS and the low voltage control harness, and is charged and discharged under the control of the internal control unit BMS, and the charge and discharge control system is connected to the battery pack internal control unit BMS through the low voltage control harness.

3. The simple battery pack control circuit as claimed in claim 2, wherein the battery pack is provided with communication interfaces including an air conditioner enable interface, a collision signal interface, an intranet CAN-H interface, an intranet CAN-L interface, a vehicle controller area network-H interface and a vehicle controller area network-L interface, and the internal control unit BMS is in communication and control connection with the vehicle through the communication interfaces.

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